from flask import render_template, current_app, session, request, jsonify

from info.models import User, News, Category
from info.utils.response_code import RET
from . import index_blu
from info import redis_store, constants


@index_blu.route('/news_list')
def news_list():
    """
    获取首页新闻数据
    """
    # 1获取参数
    # 新闻的分类id
    cid = request.args.get('cid', '1')
    page = request.args.get('page', '1')
    per_page = request.args.get('per_page', '10')

    # 校验参数
    try:
        page = int(page)
        cid = int(cid)
        per_page = int(per_page)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(error=RET.PARAMERR, errmsg='参数错误')

    filters = [News.status == 0]
    if cid != 1:  # 查询的不是最新的数据
        # 需要添加条件
        filters.append(News.category_id == cid)

    # 3.查询数据
    try:
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page, per_page, False)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(error=RET.DBERR, errmsg='数据查询错误')
    # 取到当前也的数据
    news_model_list = paginate.items
    total_page = paginate.pages
    current_page = paginate.page

    news_dict_li = []

    for news in news_model_list:
        news_dict_li.append(news.to_basic_dict())

    data = {
        'total_page': total_page,
        'news_dict_li': news_dict_li,
        'current_page': current_page
    }

    return jsonify(error=RET.OK, errmsg="OK", data=data)


@index_blu.route('/')
def index():
    """
    显示首页
    1.如果用户已经登录，将当前登录用户的数据传入模版横中
    :return:
    """

    # 显示用户是否登录的逻辑
    # 取到用户id
    user_id = session.get('user_id', None)
    user = None
    if user_id:
        try:
            user = User.query.get(user_id)
        except Exception as e:
            current_app.logger.error(e)

    # 右侧的新闻排行的逻辑
    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)

    news_dict_li = []

    for news in news_list:
        news_dict_li.append((news.to_basic_dict()))

    # 查询分类数据，通过模版的形式渲染出来
    categories = Category.query.all()

    category_li = []
    for category in categories:
        category_li.append(category.to_dict())

    data = {
        'user': user.to_dict() if user else None,
        'news_dict_li': news_dict_li,
        'category_li': category_li

    }

    return render_template('/news/index.html', data=data)


# 在打开网页的时候，浏览器会默认请求根路径+favicon.ico作网站标签的小图标
# send_static_file是flask去查找指定的静态文件所调用的方法
@index_blu.route('/favicon.ico')
def favicon():
    return current_app.send_static_file('news/favicon.ico')
